Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 2,541
Total other comprehensive income (loss)	$ 8	$ (5)	17	$ 0
Ending balance	2,391		2,391
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(24)	(31)
Other comprehensive income before reclassifications			3	0
Amounts reclassified from accumulated other comprehensive loss			3	3
Total other comprehensive income (loss)			6	3
Ending balance	(18)	(28)	(18)	(28)
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(50)	(41)
Other comprehensive income before reclassifications			11	(3)
Amounts reclassified from accumulated other comprehensive loss			0	0
Total other comprehensive income (loss)			11	(3)
Ending balance	(39)	(44)	(39)	(44)
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(2)	(2)
Other comprehensive income before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive loss			0	0
Total other comprehensive income (loss)			0	0
Ending balance	(2)	(2)	(2)	(2)
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(76)	(74)
Other comprehensive income before reclassifications			14	(3)
Amounts reclassified from accumulated other comprehensive loss			3	3
Total other comprehensive income (loss)			17	0
Ending balance	$ (59)	$ (74)	$ (59)	$ (74)